Sewage treatment method and treatment equipment of urban river sewage outlet

Abstract

The invention relates to a city watercourse drain outlet sewage treatment method. The method mainly comprise the steps of regulation, wherein sewage is introduced into a regulating reservoir for regulation; mixing with flocculant, wherein sewage in the regulating reservoir is led out to be mixed with flocculant; flocculent settling, wherein sewage mixed with flocculant is sequentially introduced into a baffle flocculation reaction tank and a settling tank for sewage flocculation and sludge precipitation separation; denitrification, wherein water discharged from the settling tank and part of water discharged from a nitration aerating filter are introduced into a denitrification filter for denitrification; aerobiotic nitration, wherein water discharged from the denitrification filter is introduced into a nitration aerating filter for nitration; filtration, wherein part of water discharged from the nitration aerating filter is introduced into a filtering device for filtration. The invention further provides a sewage treatment device adopting the method. The sewage treatment device comprises a regulating reservoir, a pipeline mixer, a baffle flocculation reaction tank, an oblique plate settling tank, a denitrification filter, a nitration aerating filter and a clear water pond which are connected in series, wherein a water outlet pipeline of the clear water pond is connected to a filter device.

Description

technical field [0001] The invention relates to a method and equipment for treating sewage at sewage outlets of urban rivers, which are mainly suitable for sewage treatment at sewage outlets of rivers for discharging domestic sewage and other similar sewage. Background technique [0002] The sewage treatment method at urban river mouths is largely a solid-liquid separation technology. The existing sewage treatment methods generally use aerated grit chambers (the most common mixed reaction tanks) and primary sedimentation tanks to remove the solids in the sewage. Suspended and colloidal substances, and then the sewage undergoes various purification functions such as physical and biological metabolism, so as to meet the requirements of sewage discharge. [0003] But there are many weak points in existing sewage treatment method: [0004] First of all, commonly used mixing reaction tanks, primary sedimentation tanks and other water treatment units have long residence time, low...

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